Patents Represented by Attorney John G. Batchelder

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  • Apparatus for water tight seaming of flexible thermoplastic sheet material
    Patent number: 3957564
    Abstract: An apparatus for bonding an elongate reinforcing strip of flexible material to an envelope, comprising a frame, a first stationary head assembly, a second head assembly, cooperating opposed drive roll means on said first and second head assemblies, reel means mounted on said frame and a heat gun mounted in said second head assembly.
    Type: Grant
    Filed: November 1, 1974
    Date of Patent: May 18, 1976
    Assignee: Drake, Crandell & Batchelder
    Inventors: Everette M. Lambert, Richard L. Ball